Single coronary artery originating from right sinus of Valsalva (Subgroup 4c). This case shows a single coronary artery arising from right sinus of Valsalva (common ostium of RCA and LAD without circumflex ramus) in a Maximum Intensity Projection (Image A). Myocardial territory usually supplied by LCX is fed by RCA (right dominant type) and LAD is noted to run intra-myocardial within the left ventricular septum (Image B; Curved Multiplane Reformatting). Note the surrounding muscular tissue (also depicted in the cross-sectional image of LAD) marked with black arrows which appears lighter grey compared to epicardial adipose tissue (white arrow). LAD: left anterior descending coronary artery; LV: left ventricle; RA: right atrium; RCA: right coronary artery; RSV: right sinus of Valsalva; RV: right ventricle.